EP 0397325 A1 19901114 - Process for producing microcapsules.
Title (en)
Process for producing microcapsules.
Title (de)
Verfahren zur Herstellung von Mikrokapseln.
Title (fr)
Procédé de production de microcapsules.
Publication
Application
Priority
JP 9229289 A 19890412
Abstract (en)
The process of the present invention uses an aminoaldehyde polycondensate as capsule-wall and a hydrophobic core material dispersed in an aqueous acidic solution containing an anionic water-soluble colloidal substance, wherein the anionic water-soluble colloidal substance comprises a mixture of an anionic water-soluble substance having a high viscosity and that having a low viscosity. The process of the present invention provides a slight viscosity rise in the encapsulation, a capsule slurry with a high concentration, low viscosity, and a slight smudging in the application as a pressure-sensitive recording sheet and the like, compared with the conventional processes.
IPC 1-7
IPC 8 full level
B01J 13/18 (2006.01); B41M 5/165 (2006.01)
CPC (source: EP US)
B01J 13/18 (2013.01 - EP US); B41M 5/165 (2013.01 - EP US); Y10T 428/2985 (2015.01 - EP US)
Citation (search report)
- [A] FR 2375903 A1 19780728 - NCR CO [US]
- [A] EP 0133295 A2 19850220 - MITSUI TOATSU CHEMICALS [JP]
- [A] EP 0070528 A1 19830126 - JUJO PAPER CO LTD [JP]
Designated contracting state (EPC)
BE DE FR GB
DOCDB simple family (publication)
EP 0397325 A1 19901114; EP 0397325 B1 19921209; AU 5298390 A 19901018; AU 627564 B2 19920827; DE 69000552 D1 19930121; DE 69000552 T2 19930527; JP 2502146 B2 19960529; JP H02273540 A 19901108; US 5061410 A 19911029
DOCDB simple family (application)
EP 90303908 A 19900411; AU 5298390 A 19900409; DE 69000552 T 19900411; JP 9229289 A 19890412; US 50705090 A 19900410